TIC 415156807

UCAC4 723-095827 · Gaia DR3 2004869675569704320 · 2MASS J22284817+5429495

Position: 22h 28m 48.17s, +54° 29′ 49.3″
V magnitude: 11.92
Where: 88 arcmin east of V345 Lac, in the 1.50° ring
Signal: Dip every 8.33 days, star not assigned. About 0.07 mag in a blended aperture, down to 94 percent of the light. A star 33 arcsec away fades by about 1 percent.

What TESS shows

Sixteen dips in the same six sectors give

Min = BTJD 1754.40505 + 8.330376 E

The aperture falls to 94 percent of its light, 0.07 mag. The fade lasts about 3 hours. The times scatter by 9 minutes rms. The largest residual is 19 minutes. A shallower dip, about 1.3 percent, falls at phase 0.5. The same times also fit 4.165 days if the deep and shallow dips alternate. TIC 415156814, V = 10.05, 33 arcsec away, fades by about 1 percent on the deeper clock and stays near full light at phase 0.5. Gaia puts the two stars at different distances. The contamination ratio is 3.32, so TESS does not say which star fades. The note is not a VSX submission.

The light curves

Six TESS sectors. Red ticks are the deeper dips.

Sector 84. Black is TIC 415156807. Blue, 33 arcsec away, drops on the deeper dip and stays near full light at phase 0.5.

All six sectors folded on the 8.33038-day period. The deeper dip is at phase 0. A shallow dip is at phase 0.5.

Finder chart

Real sky images (DSS2 red) with Gaia DR3 stars overlaid. North is up, east is left, J2000. Red tick marks point at the target (Gaia DR3 2004869675569704320, G = 11.98). Gold squares C1 to C5 are comparison stars of similar brightness. Tap an image for the full-size printable chart.

Wide finder, 30 × 30 arcmin, for star-hopping.

Close finder, 8 × 8 arcmin, to pick out the target.

Neighbor that also fades: TIC 415156814 (Gaia DR3 2004869675565979776, G = 10.01) sits 32.5 arcsec away at position angle 77° and fades on the same clock. It is the magenta diamond marked N. Measure it in its own aperture, separately from the target.

	Gaia DR3	RA, Dec (J2000)	G	BP	RP	From target
C1	2004870500199688576	22:28:48.5 +54:31:50.9	12.46	12.64	12.14	2.0′
C2	2004869366328157696	22:28:46.4 +54:27:33.5	12.08	12.18	11.88	2.3′
C3	2004857752736797696	22:29:20.2 +54:26:42.8	12.85	12.99	12.62	5.6′
C4	2004871084315248000	22:29:15.5 +54:34:04.3	12.74	13.01	12.33	5.8′
C5	2006371230489569024	22:29:33.9 +54:33:00.8	12.33	12.52	12.02	7.4′

Comparison stars are within about 1 mag of the target in Gaia G, have similar color, no close companion, and no VSX entry within 10 arcsec. Images: DSS2 red (POSS-II, STScI Digitized Sky Survey). Stars: ESA Gaia DR3.

VSX

Not filed. TIC 415156814, 33 arcsec away, fades by about 1 percent on the deeper clock. The contamination ratio is 3.32. The source is not assigned.

Next two eclipses

Eclipse 1Primary minimum, the deep one. 31 Oct 2026, 15:33 UTC · 31 Oct, 08:33 PDT Pacific · 31 Oct, 16:33 CET central Europe
Eclipse 2Secondary minimum, the shallower one. 4 Nov 2026, 19:31 UTC · 4 Nov, 11:31 PST Pacific · 4 Nov, 20:31 CET central Europe

The deeper dip is 0.07 mag in the blended aperture and lasts about 3 hours. The shallow one follows 4.17 days later. These two labels are the dips, not a choice of which star fades. TIC 415156814, 33 arcsec away, drops by about 1 percent on the deeper clock. Use two apertures. The largest residual is 19 minutes.

Help with a measurement

The useful measurement is two apertures, one on this star and one on TIC 415156814, 33 arcsec away. Pick a date if you can try.

The note

A repeating 8.33-day dip on TIC 415156807 (PDF)

These pages use the public TESS Quick-Look Pipeline and catalog positions. A prediction is not a confirmation. If you observe, write down which star was in the aperture.